21287735

素因数分解:

$5^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{7699}}^1$

素因数の和:7790

約数の個数: 16

約数和(自身を含む): 29568000

約数和(自身を除く): 8280265

約数列:

[1, 5, 7, 35, 79, 395, 553, 2765, 7699, 38495, 53893, 269465, 608221, 3041105, 4257547, 21287735]

約数ペア:

[(1, 21287735), (5, 4257547), (7, 3041105), (35, 608221), (79, 269465), (395, 53893), (553, 38495), (2765, 7699)]